Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite
In September 2002 the Antarctic polar vortex split in two under the influence of a sudden warming. During this event, the Odin satellite was able to measure both ozone (O(3)) and chlorine monoxide (ClO), a key constituent responsible for the so-called "ozone hole'', together with nitr...
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ftchalmersuniv:oai:research.chalmers.se:4026 2023-05-15T13:52:01+02:00 Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite Ricaud, P. Lefévre, F. Berthet, G. Murtagh, Donal Llewellyn, E.J. Mégie, G. Kyrölä, E. Leppelmeier, W. Brohede, Samuel Eriksson, Patrick Lautié, Nicolas Olberg, Michael Urban, Joachim et, al 2005 text https://doi.org/10.1029/2004JD005018 https://research.chalmers.se/en/publication/4026 unknown http://dx.doi.org/10.1029/2004JD005018 https://research.chalmers.se/en/publication/4026 Other Environmental Engineering 2005 ftchalmersuniv https://doi.org/10.1029/2004JD005018 2022-12-11T07:00:30Z In September 2002 the Antarctic polar vortex split in two under the influence of a sudden warming. During this event, the Odin satellite was able to measure both ozone (O(3)) and chlorine monoxide (ClO), a key constituent responsible for the so-called "ozone hole'', together with nitrous oxide (N(2)O), a dynamical tracer, and nitric acid (HNO(3)) and nitrogen dioxide (NO(2)), tracers of denitrification. The submillimeter radiometer (SMR) microwave instrument and the Optical Spectrograph and Infrared Imager System (OSIRIS) UV-visible light spectrometer (VIS) and IR instrument on board Odin have sounded the polar vortex during three different periods: before (19-20 September), during (24-25 September), and after (1-2 and 4-5 October) the vortex split. Odin observations coupled with the Reactive Processes Ruling the Ozone Budget in the Stratosphere (REPROBUS) chemical transport model at and above 500 K isentropic surfaces (heights above 18 km) reveal that on 19-20 September the Antarctic vortex was dynamically stable and chemically nominal: denitrified, with a nearly complete chlorine activation, and a 70% O(3) loss at 500 K. On 25-26 September the unusual morphology of the vortex is monitored by the N(2)O observations. The measured ClO decay is consistent with other observations performed in 2002 and in the past. The vortex split episode is followed by a nearly complete deactivation of the ClO radicals on 1-2 October, leading to the end of the chemical O(3) loss, while HNO(3) and NO(2) fields start increasing. This acceleration of the chlorine deactivation results from the warming of the Antarctic vortex in 2002, putting an early end to the polar stratospheric cloud season. The model simulation suggests that the vortex elongation toward regions of strong solar irradiance also favored the rapid reformation of ClONO(2). The observed dynamical and chemical evolution of the 2002 polar vortex is qualitatively well reproduced by REPROBUS. Quantitative differences are mainly attributable to the too weak amounts of HNO(3) ... Other/Unknown Material Antarc* Antarctic Chalmers University of Technology: Chalmers research Antarctic The Antarctic Journal of Geophysical Research 110 D5 |
institution |
Open Polar |
collection |
Chalmers University of Technology: Chalmers research |
op_collection_id |
ftchalmersuniv |
language |
unknown |
topic |
Other Environmental Engineering |
spellingShingle |
Other Environmental Engineering Ricaud, P. Lefévre, F. Berthet, G. Murtagh, Donal Llewellyn, E.J. Mégie, G. Kyrölä, E. Leppelmeier, W. Brohede, Samuel Eriksson, Patrick Lautié, Nicolas Olberg, Michael Urban, Joachim et, al Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite |
topic_facet |
Other Environmental Engineering |
description |
In September 2002 the Antarctic polar vortex split in two under the influence of a sudden warming. During this event, the Odin satellite was able to measure both ozone (O(3)) and chlorine monoxide (ClO), a key constituent responsible for the so-called "ozone hole'', together with nitrous oxide (N(2)O), a dynamical tracer, and nitric acid (HNO(3)) and nitrogen dioxide (NO(2)), tracers of denitrification. The submillimeter radiometer (SMR) microwave instrument and the Optical Spectrograph and Infrared Imager System (OSIRIS) UV-visible light spectrometer (VIS) and IR instrument on board Odin have sounded the polar vortex during three different periods: before (19-20 September), during (24-25 September), and after (1-2 and 4-5 October) the vortex split. Odin observations coupled with the Reactive Processes Ruling the Ozone Budget in the Stratosphere (REPROBUS) chemical transport model at and above 500 K isentropic surfaces (heights above 18 km) reveal that on 19-20 September the Antarctic vortex was dynamically stable and chemically nominal: denitrified, with a nearly complete chlorine activation, and a 70% O(3) loss at 500 K. On 25-26 September the unusual morphology of the vortex is monitored by the N(2)O observations. The measured ClO decay is consistent with other observations performed in 2002 and in the past. The vortex split episode is followed by a nearly complete deactivation of the ClO radicals on 1-2 October, leading to the end of the chemical O(3) loss, while HNO(3) and NO(2) fields start increasing. This acceleration of the chlorine deactivation results from the warming of the Antarctic vortex in 2002, putting an early end to the polar stratospheric cloud season. The model simulation suggests that the vortex elongation toward regions of strong solar irradiance also favored the rapid reformation of ClONO(2). The observed dynamical and chemical evolution of the 2002 polar vortex is qualitatively well reproduced by REPROBUS. Quantitative differences are mainly attributable to the too weak amounts of HNO(3) ... |
author |
Ricaud, P. Lefévre, F. Berthet, G. Murtagh, Donal Llewellyn, E.J. Mégie, G. Kyrölä, E. Leppelmeier, W. Brohede, Samuel Eriksson, Patrick Lautié, Nicolas Olberg, Michael Urban, Joachim et, al |
author_facet |
Ricaud, P. Lefévre, F. Berthet, G. Murtagh, Donal Llewellyn, E.J. Mégie, G. Kyrölä, E. Leppelmeier, W. Brohede, Samuel Eriksson, Patrick Lautié, Nicolas Olberg, Michael Urban, Joachim et, al |
author_sort |
Ricaud, P. |
title |
Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite |
title_short |
Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite |
title_full |
Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite |
title_fullStr |
Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite |
title_full_unstemmed |
Polar Vortex Evolution during the 2002 Antarctic Major Warming as Observed by the Odin Satellite |
title_sort |
polar vortex evolution during the 2002 antarctic major warming as observed by the odin satellite |
publishDate |
2005 |
url |
https://doi.org/10.1029/2004JD005018 https://research.chalmers.se/en/publication/4026 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://dx.doi.org/10.1029/2004JD005018 https://research.chalmers.se/en/publication/4026 |
op_doi |
https://doi.org/10.1029/2004JD005018 |
container_title |
Journal of Geophysical Research |
container_volume |
110 |
container_issue |
D5 |
_version_ |
1766256205021315072 |